THE ELEMENTARY PARTICLE SPECTRUM.

The relativistic quantum theory of the symmetric top implies that the spin J of a particle state can be represented as the sum of four commuting spin operators of lengths given by the positive integers or half-integers n, n, l, l. If l l is identified with the isospin, 2n - n with the strangeness, and, where applicable, -1 to the n n power with the G parity, the simplest choices of n, n, l, l lead to a correct description of J, I, S, G for every known strongly interacting meson or baryon state. Author